Resilient stamp pad



March 10, 1931- E. BAUMGARTEN RESILIENT STAMP PAD Filed Dec.

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A ZTDHNE Patented Mar. 10, 1931 UNITED STATES PATENT oFFicE EMANUELBAUMGARTEN, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR '10 VELVET PADAND INK 00., A CORPORATION OF DELAWARE RESILIENT STAMP PAD 'Applicationfiled December 16, 1927.

The invention relates to stamp pads for inking purposes, and has for itsobjects to provide an improved stamp pad of resilient construction andinherent advantages. The principal object of the invention is to providea resilient stamp pad composed of a minimum of parts which may bereadilyand conveniently assembled or dismantled when desired. In its assembledposition the pad elements are, maintained against displacement by theresilient and yielding action of its supporting base due to the natureand configuration of the latter. The peculiar and novel construction ofthe resilient base rendersthe pad readily yieldable or distortable forthe purpose of inserting or releasing the pad member while yet combiningthe advantages of firmness and rigidity when the pad is in use.

A further object is to provide a stamp pad which may be economicallymanufactured and which constitutes marked-improvements over pads of thesame general character which are now in use.

lVith such objects in view, as well as other advantages which may beincident to the use of the improvements, the invention consists in theparts and combinations thereof hereinafter set forth and claimed, withthe understanding that the several necessary elements constituting thesame may be varied in proportions and arrangement without departing fromthe nature and scope of the invention.

In order to make the invention more clearly understood there are shownin the accompanying drawings means for carry ng the same into practicalefliect, without hmit ng the'improvements in their useful appl cations,to the particular constructions WlllCh, for the purpose of explanation,have been made the subject of illustration.

In said drawings Fig. 1 is a plan view of a resilient stamp padconstituting a preferred embodiment of the invention.

Serial No. 240,477.

Fig. 2 is a side view with the removable slip cover member shown invertical section.

Fig. 3, a longitudinal vertical section on line 33 of Fig. 1.

Fig. l, a similar view of the resilient base portion of the pad.

Fig. 5 is a fragmentary detail sectional view in which the top of theink applying pad member is positioned below the top of the resilientbase member to provide a more pronounced V-shaped marginal chamber forreceiving any surplus ink from the surface of the pad, from whichmarginal chamber the ink is absorbed by the pad member.

Referring to the drawings, the frame or base of the pad is indicated at1 and is constructed of resilient material such as relatively softvulcanized rubber. The base is illustrated as of rectangularconfiguration, but it will be understood that the same may be madesquare or round or possess any other configuration, if desired. As bestseen in Figs. 1 and 4: the resilient base or frame is molded in onepiece and is provided with a central aperture 2 of substantially theconfiguration of the base member and which extends entirelytherethrough. A peripheral recess or groove 3 is provided in the baseand is suitably spaced between the top and bottom walls thereof. Saidrecess is preferably continuous and extends entirely around theresilient base member 1 as will be best seen in Figs. 1 and 4. Theresilient member or frame is further provided on its top face with aninwardly projecting pad-retaining flange or shoulder l, formedintegrally with the base member and which flange overhangs the aperture2 and is preferably continuous in extent around the entire periphery ofthe base. If desired,-a continuous recess 5 may be provided on the undersurface of the resilient base member, or a plurality of such recessesmay be employed, to form air cushions and to generally facilitate theuse of the stamp pad on a fiat surface. The provision, however, of therecess or recesses 5 is not essential in the present improvements andthe pad functions ust as effectively with out such additional cushioningprovision;

A flat base plate 6 of metal orother preferably rigid material isdesigned to he inserted within the continuous recess 3. The base plateis constructed of substantiallythe thickness and depth of the recess,and when inserted withinthe resilient base or frame member, serveslas. arigid closure and padsupporting member fitting closely at all pointsagainst the inner walls of the recess or groove 3 entirely. around theperiphery of the resilient. member 1. A pad member 7 is.

provided and may be of any well knownand desired construction. Theoverall dimensions of the pad member are substantially thesame as thoseof the aperture 2 of the base member as will be best seen in Fig. 3.

As illustrated the pad member comprises an inner filling 8"of felt orother ink absorbing material and a protective enclosing covering 9 ofcloth or linen through which the ink contained within the filling may betransmitted to a stamp or article to beinked. Thepad member is furtherillustrated as having a lower reinforcing-plate 10 also of substantiallythe dimensions of the aperture 2, which plate may be of sheet metaltoaid in maintaining and preserving the configuration of the pad memberofwhich fit constitutesa part. The pad member is providedwith a continuousperipheral shoulderll which cooperates with the inwardly projectingflange or shoulder 4 of the resilient base mem-- bertoimaintain the padagainst vertical displacement after the elements have been assembled. ir

I Ifdesired the device may include a remov c able protecting slip cover12 of sheet metal or other appropriate material and which when appliedengages the marginal shoulder 1260 of the base member, as shown in:Figs. 2 and 5.

through the resilient member 1 together with theyieldable nature of thelatter, permits the same to be easily distorted and stretched along-anyportion of its periphery or radially fromits center to accommodatethebase Pl te 6 within the continuousrecess or groove 3 oft-he base member.W hen thev plate has been thus positioned the pad member projectsunwardl throu h the un er uortioniof the central aperture 2'. and itsshoulder 1 contacts beneath the inturned peripheral flange i of the basemember to insure against furto be impressed thereon;

ther upwarddisplacement of the pad. The pad is now ready'for use'andaffords a rigid and yet resilient inking surface for a stamp Thepressure of a. stamp on theupper surfs o of the pad results in themember 1 being iorced angularly in-V vardly to more firmly grip the paddue to the cooperation and relation therewith of the rigid base plate 6.c.

The arrangement is such that when as sembled, a V shaped marginal recessor "chant ber is formed between the padinember and the shoulder 4 of thebase member. I Any surplus'of inkexuchng from the freshglyinked pad Willcollect inthis Vgshaped recess, without accumulating on the top surfaceof the resilient 'member l,'and from said recess the surplus ink isabsorbed by the pad and again distributed to'the upper surface thereof.

a In Fig. the described marginal. recess is made morep'ronounce'd byeXtending the interior wall of the flange or shoulder 4 upward to abovethe'top surface of the pad member 8. In this figure the V-shapedmarginal recess is shown at da and the clearance between thetop of thebase member and the'top of the pad'isindicated at 46. V

The operation of dismantling the pad is just as simple and isaccomplishedby merely stretching or distorting outwardly thewalls theresilient portion 1 to release the base plated from the retainingrec'essorgroove 3 to permit its removal Jwith thefpad through the bottom of the'aperture'2. f

, The construction described resiiltsin'the ink-applying membersupported by said. plate and maintained against upward" displacementbysaid continuous fiange and a marginal recess providedbetween saidcontinuous flange of the frame and said ink-applying member forcollecting surplus ink and redistributing it to said ink-applyingmember. r

2. In a stamp pad the 'conibination of a radially stretchable frame open'fronrtop to bottom, said frame having a groove in its innerperiphery,the uppe'r portion of said frame having inwardlyextendingrfiange, a pad-supporting plate in said groove,- and a pad heldon said plate and under said flange.

3. A resilient and radially stretchable frame for inking pads openfrom'top to hottom and having on its inner face a groove for a thereception and holding of an element of an inking pad.

V 4. A resilient and radially stretchable frame for inking pads openfrom top to bottom and having on its inner face a groove and an inwardlyextending flange spaced vertically therefrom said groove and flangebeing adapted to hold therebetween the elements of an inking pad.

In testimony whereof, I aflix my signature.

EMANUEL BAUMGARTEN.

